What do you do when the U.S. Anti-Doping Agency gives you the green light to return to fighting? If you’re Junior Dos Santos, you get back in the octagon as soon as possible.

And you welcome a newcomer.

Dos Santos (18-5 MMA, 12-4 UFC), a former UFC heavyweight champion, is set to take on longtime WSOF champion Blagoy Ivanov (16-1-1 MMA, 0-0 UFC) in the main event of UFC Fight Night 133, a person with knowledge of the situation confirmed to MMAjunkie. The person spoke on condition of anonymity since the UFC has yet to make an announcement. ESPN.com first reported the news.

UFC Fight Night 133 takes place July 14 at CenturyLink Arena in Boise. The card is expected to air on FS1 following early prelims on UFC Fight Pass.

Dos Santos is taking the fight in the wake of accepting a six-month suspension by USADA after the UFC anti-doping partner found that Dos Santos and two other Brazilians took tainted supplements from compounding pharmacies at the direction of their respective physicians or nutritionists. Dos Santos originally was flagged for the violation last August and, as a result, was scratched from a UFC 215 bout against Francis Ngannou.

Dos Santos, 34, hasn’t fought since his failed title bid against current champ Stipe Miocic, who defeated “Cigano” via first-round TKO last May at UFC 211. Dos Santos has alternated wins and losses over six fights since losing the belt to Cain Velasquez in December 2012.

Ivanov, a 31-year-old Bulgarian, will make his UFC debut after reigning as the WSOF/PFL champion from June 2015 to November 2017, during which time he defended the title four times. Two of those wins came by TKO via punches, and two by unanimous decision.